# print('hello')
# try:
#     # try中放置的是有可能出现错误的代码块
#     print(10 / 2)
# except:
#     # except中放置的是出错以后的处理代码块
#     print('除数不能为0！')
# else:
#     print('除法正常执行！')
# print('你好')

# print(10 / 0)


def fn():
    print('hello fn')
    print(10 / 0)


def fn2():
    print('hello fn2')
    fn()


def fn3():
    print('hello fn3')
    fn2()


fn3()
# try:
#     fn()
# except:
#     pass
